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Finding the Fourth Proportional to 398,408.01, 549,786.99 and 217,116.03

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Solution

The fourth proportional to 398,408.01, 549,786.99 and 217,116.03 is: 299,611.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,408.01 : 549,786.99 = 217,116.03 : x
  2. Step 2: Convert to fraction form
    398,408.01/549,786.99 = 217,116.03/x
  3. Step 3: Cross multiply
    398,408.01x = 549,786.99 × 217,116.03
  4. Step 4: Simplify right side
    398,408.01x = 119,367,568,614.45
  5. Step 5: Solve for x
    x = 119,367,568,614.45/398,408.01
  6. Step 6: Final answer
    x = 299,611.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.